I got a worked TXP 4 from Billy at Performance Propellers and it hauls the mail on my rig. Holeshot was under 4 seconds, midrange is punchy, and top end was good. Thats with 2 big men and all the goods. Try it on when you get a chance. I think the fact that the one I got was worked a little at Performance Props probably made a difference though. Call em and ask em.